Hello! Its me again. 5 days ago I got 3 big stones from outside. For the first 3 days, they were soaked in tap water. In the fourth day, I drained the water out from the bucket and left the stones to dry. After they dried, I poured some vinegar on it to test if there is calcium carbonate(? I saw this on the Internet) but it did not fizz which means its safe (as the website I visited says). I rinsed it well and scrubbed with tap water after it. Right now, its in a small bucket of water again (as you see in the photo). Are they good to go in the aquarium? Thanks in advance!